Quicksilver Quandary

WILL TONS OF MERCURY now housed in eight U.S. chemical plants eventually get into the hands of poverty-stricken people panning for gold in developing countries and then into rivers and the air?

The U.S. government, led by the Environmental Protection Agency, is aware that the marketplace forces of supply and demand could make this scenario into a reality. With a goal of preventing that from happening, policy analysts now are studying how best to . . .